USN-4772-1

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    USN-4772-1

    Published: 15 Mar 2021Last Modified: 29 Jun 2026

    Summary: vnc4 vulnerabilities

    Details: USN-2500-1 addressed CVE-2015-0255 for xorg-server. This update provides the corresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2015-0255) USN-2726-1 addressed CVE-2015-1283 for Expat. This update provides the corresponding fix for VNC4 on Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2015-1283) Original advisory details: Olivier Fourdan discovered that the X.Org X server incorrectly handled XkbSetGeometry requests resulting in an information leak. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly obtain sensitive information. (CVE-2015-0255) It was discovered that Expat incorrectly handled malformed XML data. If a user or application linked against Expat were tricked into opening a crafted XML file, an attacker could cause a denial of service, or possibly execute arbitrary code. (CVE-2015-1283)

    References: https://ubuntu.com/security/notices/USN-4772-1, https://ubuntu.com/security/CVE-2015-0255, https://ubuntu.com/security/CVE-2015-1283

    Affected packages

    Package

    Name: vnc4

    Purl: pkg:deb/ubuntu/vnc4?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1

    Affected versions

    4.1.1+xorg4.3.0-37ubuntu5
    4.1.1+xorg4.3.0-37ubuntu5.0.1
    4.1.1+xorg4.3.0-37ubuntu5.0.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-4772-1 | CVE-DB